TELCO types, I have a question

So, I figure someone out there knows the answer to this, and I’ll share my guess, but I can’t find an answer on the internet. My Question: Why does my cell phone ignore (or add) a “1” with a phone call, but my POTS* line phone doesn’t. Not only does it not just ignore unnecessary “1”s, it makes the annoying tri-tone and tells me it’s not necessary to dial a 1. Well, if you know it’s not necessary, why not ignore it and put the call through?   My guess: the equipment being used is so old it cannot be taught new ticks, but I’d be interested in an informed answer. *Plain Old Telephone System (I found this when getting my first DSL line). No related posts.
Source: GruntDoc - Category: Emergency Medicine Authors: Tags: Web/Tech Source Type: blogs